Paper-making apparatus.



P. GOUPER. PAPER MAKING APPARATUS.

APPLICATION FILED OUT. 18, 1912.

Patented Jan. 27, 1914.

. Appar tus, of which the PATENT @FFEQE.

PETER COUPER, 013 OAKENHOLT, WALES.

PAPER-MAKING Specification of Letters Patent. Application filed October18, 1912.

APPARATUS.

Patented Jan. 27, 191%. Serial No. 726,483.

To all whom it may concern:

Be it known that I, PETER GoUPnR, a sub ject of the King of England, andresident of ()akcnholt, in the county of Flint, Wales, have inventedanlmproved Paper-Making following isa specification.

This invention has reference to paper making apparatus of the kinddescribed and illustratcd'in my prior Patent no. 81900 1 dated April24th 1906. in such apparatus the'green pulp is taken just as it leavesthe straining plant and is concentrated before the bleach is added. Thisconcentrated pulp is then delivered by the machine to a suitable vesselwhere the desired quantity or" blcach is run among the fibers. The pulpis allowed to remain in the bleach liquid for some time until therequired degree of whiteness is obtained; Then it is conveyed by acentrifugal or other pump through a pipe to said apparatus where thespent bleach liquor is extracted from the pulp, the concentrated fiberbeing delivered to a vessel where it is washed by the machine with cleanwater until no trace of chloriu remains. The washed pulp, preferablyfree from chlorin, is again delivered to my apparatus and concentratedto a very close consistency and dried as if the pulp has been passedover a press pate.

The aforesaid objects are attained by means of a drum with a perforatedsurface and having a series of compartments or buckets fitted inside,the said drum rotating inside an outer stationary casing, while a feedpipe and contracted mouth piece in combination with a centrifugal orother pump are so arranged as to deliver the wet pulp with force againstthemeshcs of the perforated drum so that it is detained thereon, and thewater is forced through said meshes and along the partitions inside thedrum whence it is drawn otl. Thus the water drips through the perforatedsurface of the drum and is drawn oil' by gravity.

i am aware that it has been prexdously proposed to provide and arrange asuction box or suction boxes within the perforated rcvolublc shells orrollers. or drums of paper making apparatus for the purpose ofren'uiviug the water from the pulp, said suction boxes being eitherstationary or adapted to beadjustcd axiallyor radially or both andfitting with their open top tightly againstthe inner face of therotating drum.

The leading features which distinguish the present apparatus,hereinafter described, from paper making machines of the kind describedand from my patent previously referred to, consist herein thatalLcompartments in the drum are dispensed with, turther in thesubsequent drawing off of the water dripping through drum by means of asuction box fitted to a slotted pipe, the latter extending through thedrum and being adapted to be connected with a suction pump.

Further essential features of this invention consist in that the saidpipe is mounted on standards and made vertically adjustable thereinwhile a rubber ring fitted to the top of the open suction box insures aneasy and tight fit with the interior of the rotating drum.

Other novel features are the provision of a device to recover the pulpfrom the machine baclc alter and the arrangement at or near the mouthpicite of the feed pipe of a slide which may be adjusted in order toprevent: the water from rushing too freely over the top of the drum.

In order that this invention may be more clearly understood reference ismade to the accompanying drawings in which Figure 1 shows an endelevation of the apparatus; Fig. 2 shows a longitudinal section throughFig. 1; Fig. 3 shows a central section through Fig. 2, and l? ig. 4shows an end view of the apparatussomewhat modified, tliisdesign' beingparticularly adapted for the recovery of the pulp from the inahhine backwater.

With reference to 1, 2 and pro vision is made of a rotary drum (I havinga perforated surface adapted to detain the fiber of the pulpat the sametime allowing the liquidto drain through. the said pcrforations. Thedrum mounted upon sleeves (/3, n? the latter bearing in the ends 7), Z)of a frame or pedestal, both sleeves and drum being rotatrd by mean: ofwheel r;- and suitable gearing meshing therewith. As in my previouspatent rcic "red to above a mouth-piece J of a feed pipe 0 is arrangedin close proximity to th surface or the drum through \Villt'l the pulpconveyed by means of ii pump (not shown) and forced against the surfaceall said drum. .lu this manner the pulp driven and read I against thenicshcs of the drum and collected and compacted thereon.-aExtendinglongil l l 5' I i l I l l i l the meshes or" the tudinally through thedrum and the sleeves rotation. Arranged near forated surface of the drum-made of a suitably mounted scraper or rollers q and The action of theapparatus, Fig. 4, is as follows: Subsequent to the delivery of the pulpon to the drum, the suction or vacuum pump draws the draining waterthrough the felt and the drum into the suction box, then into the pipe 7whence it is delivered into a vessel (not shown). The felt as it rotatesaround the drum next passes between the press rollers q and 1" and thepulp and-other matter is retained on the top side of the felt, but as itpasses between the said press rollers, the top roller q picks up theparticles of fiber from the felt and the scraper or doctor removes itfrom this roller. t and 15 designate press rollers between which thefelt passes and u is a'spray pipe serving to rinse the felt.

Having now fully described my said invention what I claim and desire tosecure by Letters Patent is 4 In the herein described paper makingapparatus, the combination with a perforated rotary drum, of sleeves forcarrying the said drum, standards and a pedestal constituting the frameof the apparatus, a. slotted vertically adjustable pipe bearing in saidstandards and extending through the drum and the sleeves, a suction boxfixed to the central portion 0 the pipe'and'communicating with the slotin the latter, a rubber rim fitted to the top of the suction bOX, a feedpipe to lead the pulp onto the said rotary drum, and an adjustable slidenear the mouth of said feed pipe, all substantially as specified andshown and for the; purpose set forth, In testimony whereof my hand inthe presence witnesses.

f having a slot 1 The ends of said pipe are bearing in standards 9 and.provided with flanges h, the latter serving 'as a means to connect thepipe to a vacuum ump. Each end of the said pipe f is thus adapted to beconnected to a suction pump (not shown) and has moreover a square piecez fashioned thereon which is guided in a corresponding openingl of thestandards 9 and vertically adjustab e by means 0 set screws 70 in orderthat the pipe may be raised or lowered as the case may be. Mounted uponthe center part ofthe pipe f is a suction box Z of copper or gun metalinto which the liquid drips and from the latter is sucked through thepipe f'into any, suitable vessel. The top of said suction box has fittedto it a rim Z of rubber which bears against the inner face of the drumand causes a tight fit with the latter during its the top of the rotarypressure roller device, preferab drum is furthermore a m which by anyknown by the means as described in my prior specification, is adapted topress against the perthereby further also concentrating the pulp.Provision is doctor 0 which causes the removal 0 the concentrated pulpfrom the roller as the latter rotates.

Referring now to Fig. 4, this apparatus is specially designed for therecovery of the pulpfrom the back-water of the machine. A feltp fittedover the drum and covering same ispassed between and guided by press r,which rollers are conveniently mounted on the frame of the machine.

f two subscrib In order to prevent the water rushing too i I PETERCOUPER. freely over the top of the drum, I provide Witnesses: a v aneasily adjustable slide 8 at a suitable dis- J OHN A. MILLER,

tance from the mouth-piece d. H. WILLIAMS.

I have hereuntoiset t

